Wristwatch



FIG. 1 is a front elevational view of a wristwatch showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a bottom plan view, the top plan view being a mirror image thereof; and,

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a wristwatch, as shown and described. 